Cutting and/or abrading tool

ABSTRACT

A cutting and abrading tool or &#39;&#39;&#39;&#39;shaver&#39;&#39;&#39;&#39; comprises a handle and a multi-apertured and multi-toothed blade. The blade has a pronounced natural curvature and narrow hooked ends. The head of the handle has grooves for the hooked ends of the blade, to provide lateral location, and parts which the hooked blade ends hook around to clip the blade to the handle. The blade has to be less curved than it naturally is to clip itself to the handle, this stressing of the blade contributing to security of attachment of the blade to the handle.

States Patent [191 [451 Aug. 20, 1974 CUTTING AND/OR ABRADING TOOL [75] Inventor: David Bradshaw Scott, Sheffield,

England [73] Assignee: Stanley Tools Limited, Sheffield,

England [22] Filed: Apr. 11, 1973 [21] Appl, No.: 350,083

France 29/78 Switzerland 29/78 Primary Examiner-Harrison L. Hinson Attorney, Agent, or FirmPrutzman, Hayes, Kalb & Chilton [57] ABSTRACT A cutting and abrading tool or shaver" comprises a handle and a multi-apertured and multi-toothed blade. The blade has a pronounced natural curvature and narrow hooked ends, The head of the handle has grooves for the hooked ends of the blade, to provide lateral location, and parts which the hooked blade ends hook around to clip the blade to the handle. The blade has to be less curved than it naturally is to clip itself to the handle, this stressing of the blade contributing to security of attachment of the blade to the handle.

4 Claims, 4 Drawing Figures I CUTTING AND/R ABRADING TOOL BACKGROUND OF THE INVENTION This invention relates to cutting and/or abrading tools of a type comprising a cutting and/or abrading element removably attached to a support.

It is an object of the invention, as seen from one aspect of the invention, to provide a cutting and/or abrading tool of the above-mentioned type in which the cutting and/or abrading element is of relatively simple manufacture, holds itself securely to the support when in use and yet can readily be removed and replaced.

SUMMARY OF THE INVENTION As seen from one aspect of the invention there is provided a cutting and/or abrading tool comprising a cutting and/or abrading element removably attached to a support, the tool being constructed so that one end portion of said element can be unclipped from a corresponding part of the support and can be clipped again onto said part of the support while an opposite end portion of said element is in engagement with another corresponding part of the support, said support holding said element in a stressed condition so that said element holds itself to the support.

Preferably both end portions of said element are hooked around the corresponding parts of the support.

Preferably the element has a working surface which is convex in a direction from either end to the other end and which has apertures with cutting teeth at the edges of the apertures.

Preferably the end portions of said element engage in grooves in said support to provide lateral location of said element relative to the support.

The end portions may be narrower than an intermediate portion of said element.

The element may have a working surface which is at least as wide as any part of said support so that the tool can be used for cutting a slot of unlimited depth.

IN THE DRAWINGS FIG. 1 is a side elevation of a cutting and abrading tool in accordance with the invention;

FIG. 2 is a plan view of the tool of FIG. 1;

FIG. 3 is a longitudinal section through the middle of the tool of FIGS. 1 and 2; and

FIG. 4 is a plan view of the cutting and abrading element alone of the tool of FIGS. 1, 2 and 3.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, the illustrated tool is a cutting and abrading tool in the form ofa shaver" and comprises a cutting and/or abrading element 11, in the form of a blade, removably attached to a support in the form of a handle 12, the tool 10 being constructed so that one end portion 13 of said element 11 can be unclipped from a corresponding part 14 of the handle 12 and can be clipped back again onto said part 14 of the handle 12 while an opposite end portion 15 of element 11 is in engagement with another corresponding part 16 of the handle 12, the handle 12 holding element 11 in a stressed condition so that said element holds itself to the handle 12.

End portions 13 and 15 are both hooked around the corresponding parts 14 and 16 of handle 12.

Element 11 has a working surface 17 which is convex as shown, in a direction from one end to the other end, and which has apertures 18, with cutting teeth 19 at the edges of the apertures 18.

The end portions 13 and 15 of element 11 engage in grooves 20 and 21 to provide lateral location of element 11 relative to the handle 12, the shapes of grooves 20 and 21 being complementary to the shapes of end portions 13 and 15. End portions 13 and 15 are both narrower than an intermediate portion 22 of element 11.

Element 11 is formed along one side thereof with side teeth 23 which project laterally of the handle 12, as shown in FIG. 2, for cutting a step. A modified element may have similar side teeth along the opposite side thereof projecting laterally of the handle 12, for cutting a slot.

More particularly, the apertures 18 and teeth 19 of element 11 are in parallel rows one behind another, the rows being generally transverse but not perpendicular to the longitudinal axis of element 11, gaps between teeth of each row lying directly behind and/or in front of teeth of another row so that the whole of a surface area of a workpiece within the width of the elements working surface 17 can be abraded by longitudinal movement of the tool 10. The end portions 13 and 15 of element 11 are curved as shown, being more curved when unstressed, that is, when element 11 is detached, than when stressed by the handle 12. In addition, the working surface 17 is more curved when unstressed, that is, when element 11 is detached, than when stressed by the handle 12. Removal of element 11 can be carried out by pressing end portion 13 downwardly, whilst replacement can be carried out by pressing end portion 13 upwardly, the end portion 15 in each case engaging handle part 16 as shown.

The handle 12 has a head 24 joined by a neck 25 to a body part 26. Handle parts 14 and 16 and grooves 20 and 21 are in the head 24. The shape of handle part 14 is carefully designed empirically to provide secure holding of element 11 and yet enable ready removal and replacement thereof, due regard being paid to dimensions, geometry and material of element 11.

Although the illustrated blade 11 is similar, in respect of the formation of its cutting teeth, to blades of the make known as Surform, and although the illustrated handle 12 is similar in overall formation to handles of known Surform shaver tools, the invention is not limited either to such a form of blade or to such a form of handle.

I claim:

1. A cutting and abrading tool consisting of a one piece support member having a handle portion and a blade attaching head portion integrally connected to the handle portion; and a cutting and abrading blade having a longitudinally convex work surface provided with a plurality of cutting and abrading teeth, said blade having integral hook clips on each longitudinal end of the convex work surface for snap-on attachment to the head portion of the support member, said head portion having fixedly spaced shoulders for cooperatively retaining said hook clips, said blade in its relaxed condition having a sufficient degree of convex curvature to provide a spacing between the hook clips that is substantially less than the fixed spacing between said 3. A tool as claimed in claim 1 wherein the element is formed along one side thereof with side teeth which project laterally beyond the edge of the support, for cutting a step.

4. A tool as claimed in claim 3 wherein the element has similar side teeth along the opposite side thereof projecting laterally beyond the edges of the support, for

cutting a slot. 

1. A cutting and abrading tool consisting of a one piece support member having a handle portion and a blade attaching head portion integrally connected to the handle portion; and a cutting and abrading blade having a longitudinally convex work surface provided with a plurality of cutting and abrading teeth, said blade having integral hook clips on each longitudinal end of the convex work surface for snap-on attachment to the head portion of the support member, said head portion having fixedly spaced shoulders for cooperatively retaining said hook clips, said blade in its relaxed condition having a sufficient degree of convex curvature to provide a spacing between the hook clips that is substantially less than the fixed spacing between said shoulders so that the cooperative snap-on attachment of the clips on the shoulders reduces the degree of convex curvature of the blade and places the blade in a stressed condition for urging the blade into constant secure retention on the one piece support.
 2. The tool of claim 1 wherein said work surface is at least as wide as the support and both the shoulders on the support and the hook clips on the blade are narrower than the work surface of the blade to provide lateral location of the blade relative to the support.
 3. A tool as claimed in claim 1 wherein the element is formed along one side thereof with side teeth which project laterally beyond the edge of the support, for cutting a step.
 4. A tool as claimed in claim 3 wherein the element has similar side teeth along the opposite side thereof projecting laterally beyond the edges of the support, for cutting a slot. 